81412470 has 48 divisors (see below), whose sum is σ = 216844992. Its totient is φ = 21179520.

The previous prime is 81412453. The next prime is 81412481. The reversal of 81412470 is 7421418.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7342 + ... + 14721.

It is an arithmetic number, because the mean of its divisors is an integer number (4517604).

Almost surely, 2^81412470 is an apocalyptic number.

81412470 is an abundant number, since it is smaller than the sum of its proper divisors (135432522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81412470 is a wasteful number, since it uses less digits than its factorization.

81412470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22117 (or 22114 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 81412470 is about 9022.8859019717. The cubic root of 81412470 is about 433.4080535189.

Adding to 81412470 its reverse (7421418), we get a palindrome (88833888).

The spelling of 81412470 in words is "eighty-one million, four hundred twelve thousand, four hundred seventy".